Mark Lord wrote:
Jeff Garzik wrote:
Applied, though I would like a follow-up which simply guarantees that
irq coalescing is off.
Perhaps. I'm getting pressure to do the exact opposite from users
of this chipset --> they'd like IRQ coalescing to be guaranteed to
be turned *on*. Maybe a sysfs attr for it, with default == off ?
Yes, I should have been more clear. Support is fine, as long as the
default is off.
Unless you have a _lot_ of ports active at the same time, irq coalescing
can increase latency.
Ideally, for this, AHCI, and any other SATA controller that does
coalescing, we have a runtime dynamic trigger that turns on coalescing
when interrupt traffic exceeds a runtime limit.
Jeff
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